题目内容
The state of Florida is best known for its beaches and plam trees. But a good mass of it is swampland. The famous Everglades, a slow-moving sheet of water full of plants and alligators(短吻鳄), cover much of the southern part of the state. To the north, the Okefenokee, which is partly in Florida and mostly in neighboring Georgia, is a true swamp(沼泽) with its own alligatoers and snakes and even beautiful orchids.
It was formed when waters from an ancient ocean receded and a large sandbar blocked most of the water flow to the sea. Left behind was an 1,800-square-kilometer swamp.
There’s no big city within 200km, but tourists from all over the world manage to find it. They all want to know about its unusual name. Okefenokee is a Miccosukee Indian word meaning land of trtembling earth. Way back in the swamp are small, floating islands, called hammocks, which one can walk across. But they tremble. Standing on them is like trying to balance on a floating mattress(床垫).
The Okefenokee, which is already nearly filled with plants, would probably dry and become just another forest, were it not for range fires that come along every once in a while and burn out rotton vegetation（植被）. So the water in this protected National Wildlife Refuge keeps moving—slowly, very slowly.
45．According to the passage, Everglades lies__________.
A．mainly in Georgia
B．south of Okefenokee
C．north of Florida
D．near National Wildlife Refuge
46．The underlined word “receded”in the second pargaraph probably means__________.
A. dried up B．floated away C．poutred down D．drew back
47．The third paragraph mainly tells us__________.
A．where Okefenokee is located
B. what the size of the Okefenokeeis
C．how Okefenokee gets its special name
D. how shaking islands come into being
48．What can be inferred according to the text?
A．Range fires prevent Okefenokee from drying up.
B．Hammocks tremble constantly but do not move.
C．Okefenokee’s alliagtors attract many tourists.
D. Florida and Georgia cover 1,800 km in total.
45—48BDCA
阅读快车系列答案Science can't explain the power of pets, but many studies have shown that the company of pets can help lower blood pressure (血压) and raise chances of recovering from a heart attack, reduce loneliness and spread all-round good cheer.
Any owner will tell you how much joy a pet brings. For some, an animal provides more comfort than a husband/wife. A 2002 study by Karen Allen of the State University of New York measured stress (紧张) levels and blood pressure in people— half of them pet owners —while they performed 5 minutes of mental arithmetic (算术) or held a hand in ice water. Subjects completed the tasks alone, with a husband/wife, a close friend or with a pet. People with pets did it best. Those tested with their animal friends had smaller change in blood pressure and returned most quickly to baseline heart rates. With pets in the room, people also made fewer math mistakes than when doing in front of other companions. It seems people feel more relaxed (放松)around pets, says Allen, who thinks it may be because pets don't judge.
A study reported last fall suggests that having a pet dog not only raises your spirits but may also have an effect on your eating habits. Researchers at Northwestern Memorial Hospital spent a year studying 36 fat people and their equally fat dogs on diet-and-exercise programs; a separate group of 56 people without pets were put on a diet program. On average, people lost about 11 pounds, or 5% of their body weight. Their dogs did even better, losing an average of 12 pounds, more than 15% of their body weight. Dog owners didn't lose any more weight than those without dogs but, say researchers, got more exercise overall-mostly with their dogs - and found it worth doing.
1.What does the text mainly discuss?
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A．What pets bring to their owners. |
B．How pets help people calm down. |
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C．People's opinions of keeping pets. |
D．Pet's value in medical research. |
2.We learn from the text that a person with heart disease has a better chance of getting well if_________ .
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A．he has a pet companion |
B．he has less stress of work |
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C．he often does mental arithmetic |
D．he is taken care of by his family |
3.According to Allen, why did the people do better with pets around when facing stressful tasks?
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A．They have lower blood pressure. |
B．They become more patient. |
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C．They are less nervous. |
D．They are in higher spirits. |
4.The research mentioned in the last paragraph reports that________ .
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A．people with dogs did more exercise |
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B．dogs lost the same weight as people did |
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C．dogs liked exercise much more than people did |
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D．people without dogs found the program unhelpful |